diff --git a/src/server/distrend.c b/src/server/distrend.c
--- a/src/server/distrend.c
+++ b/src/server/distrend.c
@@ -31,6 +31,7 @@
 #include "options.h"
 #include <confuse.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <malloc.h>
 #include <unistd.h> /* getopt */
 #include <time.h>